Tripping mechanism for printing machinery



1,626,304 Apr-11 26 1927- s, L. sHARPLESS TRIPPING MECHANISM FOR PRINTING MACHINERY Filed 001:. 28, 1925 10' sheets-sheet 1 I4! ISI 2J2 l m4 3 us a 227 kiwi? INVENTOR.

W N/M April s. L. SHARPLESS TRIPPING MECHANISM FOR PRINTING MACHINERY Filed Oct. 28, 1925.

10 Sheets-Sheet 2 1 626,304 26 1927' s. L.. SHARPLESS 4 TRIPFING MECHANISM FOR PRINTING MACHINERY Filed Oct- 28, 1925 10' Sheets-Sheet 3 24 \ZI 2e 62 April 4 26, 1927.

S L. SHARPLESS TRIPPING MECHANISM FOR PRINTING MACHINERY Filed Oct. 28. 1925 10 Sheets-Sheet 4 INVENTOR.

April 26 1927.

s. L. SHARPLESS TRIPPINQ MECHANISM FOR PRINTING MACHINERY Filed Oct- 28, 1 10 Sheets-Sheet 5 IN VEN T OR.

S. L. SHARPLESS TRIPPING MECHANISM'FOR PRINTING MACHINERY Filed Oct. 28. 1925 10 Sheets-Sheet 6 I06 H$ /NVENTOR-.

v "hasv 1,626,304 April 26 1927' s. L. SHARPLESS TRIPPING MECHANISM FOR PRINTING MACHINERY Filed Oct. 28, 1925 10, Sheets-sheet 8 1,626,304 APrll 26 1927' s. L. SHARPLESS TRIPPING MECHANISM FOR PRINTING MACHINERY Filed 06*;- 28. 1925 m s t s t. 9

. .I'lg. l4

IN VEN TOR 13261304 Aprll 26 1927 s. SHARPLESS' TRIPPING MECHANISM FOR PRINTING MACHINERY 'Filed Oct. 28. 1925 10 Sheets-Sheet 10 IN l/EN 7 0R.

Patented Apr.' 2 6fl927.

s'rawan'r L. SHARPLESS, or IL AUKEE, wrsconsm.

TBIPPING MECHANISM FOR PRINTING MACHINERY.

Application filed October 28, 1925. Serial No. 65,853.

My invention relates to tripping mechanism for printing machinery, and 1s exemlified in connection with a'printlng press liaving a rotary printing member on which tripping mechanism operates for placing the printing couple in on-impression relation ,or in off-impression relation. I

It is the object of my invention to provide novel means whereby a member of a printing couple is placed in off-impression position prior to the normal coactive printing relation between the members of said printing couple, and whereby said member is maintained in said oil-impression position throughout the normal printing movement between said members; further, to provide novel means whereby a member of a printing couple is placed in on-impression position prior to the normal coactive printing relation between the members of said printing couple, and whereby said member is maintained in said oil-impression position throughout the normal printing movement between said members; and, further, to provide novel means for moving a member of a printing couple into on-impression relation after a previous normal printing movement between the members of said printing couple and prior to the next succeeding normal printing movement between said, members, with an interim between said on-impression movement and the normal printing movement between said members, during which said member may be moved into off-impression position.

The term printing movement is used to designate that movement between the members during which the form and sheet are in opposed relation, whether or not the members are in printing proximity.

It is the object of my invention further to provide novel tripping means for a plurality of printing couples so arranged as to place members of the respective printing couples in oil-impression position in sequence; further, to provide novel means whereby members of the respective printing couples are placed in on-impression relation in sequence; and, 'further, to provide novel means whereby to move a rotating member of a printing couple sequentially into active relation and into inactive relation throughout different angles of the rotative movement thereof.

It is the object of my invention further to provide novel means for timing the coactive relations in the .tri ping means for succeedin printing coup es; and, further, to prov1 e novel means whereby the tripping movement for one printing couple is automatically transmitted to trippm mechanism for another printing couple in sequence.

It is the. object of my invention further to provide novel means for rendering the tripping mechanism efi'ective for on-impres- SlOIl re1at1on in the printing couple during an angular movement of the grippers of the rotatmfg impression cylinder between the time o paper-taking action of said grippers and the time of initiation of printing impresslon, and for off-impression relation between sald members during a succeeding angular movement of said grippers between said aforenamed times; and, further, to provide means whereby the members of the printing couple remain in the relationwhich they occupyat the completion of said respective angular FIIlOVGlTlGlltS throughout the balance of the circle of movement of said rotative member.

It is the object of my invention further to provide novel means for controlling a tripping movement; further, to provide novel means for effecting a trip-ping movement; and, further, to provide novel means for controlling and effecting tripping movements in successively acting printlng couples automatically with relation to each other.

My invention will be further readily understood from the following description and claims, and from the drawings, in which latter:

Fig. 1 is a side elevation of my improved device, shown in connection with the feed side of a rotary printing press, partly broken away, having a plurality of printing couples, with the members of the latter in on-impression relation.

Fig. 2 is a side elevation of ,the same, viewed from the gear side of the printing press.

a Fig. 3 is a side elevation of the same, viewed from the feed side, partly broken away, for exposing the interior of the housing and the relations of the members of the printing couples, the lower one of the,

latter being shown in oil-impression relation and the upper one 1n on-lmpresslon relation, with the parts of the tripping mechanism' in corresponding relations. Fig. 4 is a similar view, showing both the 1 in the plane of cylinders. may. be

' within device, taken in the same, taken in the d Fig. 7 is a plan section of my improved plane of the irregular line 7-7 of Fig. 1. v

Fig. 8 is a plan section of the same, taken in the plane of the line 8 8 of Fig.6, .partly broken away. Fig. 9 is a plan section of the same, taken the line 9-9 of Fig. 6. Fig. 10 is a detailin section, taken on the line 10-10 of Fig. 1.

Fig. 11 is 'a vertical section of the same, taken in the plane of the line 11-11 of Fig. 10. a

Fig. 12 is a vertical sectional detail, taken on the section line 12-12 of Fig. 8.

Fig. 13 is a vertical section, showing a detail "of the trip control means, taken in the plane of the irregular line 1313 of Fig. 14.

Fig. 14 'is a vertical cross-section of the plane of the irregular line 14-14 of Fig. 13.

Fig. 15 is a side elevation showing a diagrammatic representation of the tripping mechanism for the upper impression cyl- 5 inder.

Fig. 16 is mechanism inder.

I have in a similar view of the tripping for the lower impression cyltrated a, rotary printing press comprising a printing stand 21, in which a lower impression cylinder 22, an upper impression cylinder 23, a transfer cylinder 24,, form cylinders 25, 26, 27 and 28, as well as a feed cylinder 29, are journaled. The'form of any and are represented as. plate cylinders, on which printing plates -31, 32, 33, 34, are suitably secured, the printing surfaces of the printing plates having ink applied thereto by any suitable inking rollers, indicated for instance at 35, 36, 37 and 38. It is of course obvious that my invention is applicable to other types of printing presses, thespirit of my invention and the scope of the appended claims.

Each of the impression cylinders is exemplified as a so-called single revolution cylinder, having a t mpan surface 39 throughout substantially al its circumference, during coaction of which with the form cylin e rs the printing takes place, and a relief the present exemplification illussuitable character,"

ing press will be described, and the similar theframe by means which are du heated at the respective ends ofsaid cylin ers.

The means at the feed side of the print- They may also havemeans at the gear side of the printing press indicated .by similarbut primed reference numerals.

The impression cylinder 22- has ashaft 41 journaled in a a guideway 43 of the side member of the frame 21. (See Figs. 1, 2, 3, 4, 10 and 11.) A rock shaft 44 is journaled in bearings 45 of a spacing block 46 secured to the frame, and has an eccentric 47 thereon, which. is

bearing block 42 slidable in operable in a slot 48 in a lug 49 of the bearin block 42,

the lug being slidably received between the bearings 45.

The impression cylinder 23 has a similar shaft 51 journaled in a bearing block 52 slidable in a guideway 53 in the side member of the frame. A rock shaft 54 is jourand has an eccentric 57 thereon, which is operable in a slot, slmilar to the slot 48, in a lu 59 of the bearing block 52, the lug being slidably received between the bearings naledin bearings 55 at the respective sides" of a spacing block 56 secured to the frame,

on the feed cylinder, whence it is trans ferred automatically to grippers 67 on a gripper shaft 68, rockable in the impression cylinder 22, and operated in suitable manner, so as to take the sheet from thefeed iio cylinder and carry it in the rotation 'of the cylinder 22 past the, form cylinders25, 26, each of which prints a different color on the sheet. The grippers 67 automatically deliver the infeed-ing edge of the sheet to suitable grippers 71 on a rockable gripper shaft 72, on the transfer cylinder 24, the said grippers being operated in suitable and usual manner. The infeeding edge of the sheet is automatically transferred from the latter to suitable grippers 73. on a rockable gripper shaft 74, operated in usual and suitable manner, 74 being mounted on the impression cylinder 23. The impression cylinder 23 carries the sheet past the form cvlinders 27, 28, each of which prints a different color impression on the sheet.

the gripper shaft automatically fromthe feed cylinder to the lower impression cylinder, past the lower form cylinders, then transferred automatically to the transfer cylinder, in turn automatically transferred to the upper impression cylinder, past the upper form cylinders, whence it is automaticallydelivered to suitable delivery mechanism, a portion of which is indicated at 75. A pair of form cylinders is shown coacting with each of the impression cylinders.

The various cylinders are caused to retate at uniform peripheral speeds. .The driving means for the cylinders is exemplified as an electric motor81, the armature shaft 82 of which has a suitable pulley fixed thereto, about which and about a pulley 83 a suitable belt 84 is arranged to move for driving the pulley 83. The pulley 83 is fixed to a shaft 85 journaled in suitable hearings in a bearing stand 86, agear 87 being fixed to said shaft and meshing with a gear 88 fixed to a shaft89 rotating in a bearing 90 in the bearing stand.

The gear 88 meshes with a gear 91, fixed to a shaft 92, which is the shaft of the transfer cylinder, journaled in a suitable bearing 93 adjustable in the frame.

The gear 91 is a double width gear, and

meshes with gears 94, 95, fixed to the shaftsof the impression cylinders 22, 23. Gears 96, 97, mesh with the gear 94, and gears 98, 99, mesh with the gear 95, the gears .96, 97, and 98, 99, being fixed to the respective shafts of the form cylinders. A gear fixed to the shaft 61 of the feed cylinder meshes with the gear 94. (See Fig. 2.)

The impression cylinders 22, 23, are rotatable in on-impression positions with relation to the form cylinders, or in off-impression positions with relation thereto, and I have provided means for controlling said respective positions, and for moving said respective Impression cylinders at predetermined points in their respective revolutions. I have provided means for timing said respective movements with relation to each other, in such manner that, when a sheet to be rinted is improperly gripped or it is deslred for other reasons not to print the same, the impression. cylinder, which acts first on the sheets, shall be moved into off-impression relation only after a preceding sheet being printed b the same cylinder is fully printed by the orm cylinders coacting therewith, and in such manner that said preceding sheet shall also be completely printed between the succeeding im ression cylinder and its coacting form cylmders, after which only shall said. succeeding impression cylinder be tripped into off-impression relation.

The infeeding edge of the sheet, when properly placed on the feed table with relation to the feed cylinder, is automatically transferred from the gripping mechanism of each cylinder to the grippingmechanism of each succeeding cylinder, whether the impression cylinders are in on-impression relation or in off-impression relation.

The eccentric rock shaft 44 has an arm 101 fixed thereto. A rock shaft 102 is journaled in a bearing 103, in the side frame, and has arms 104,- 105, fixed thereto. A link 106 is articulated with the arms 101 and 104. A link 107 is articulated with the arm and an arm 108 on the eccentric sleeve 62. Similar parts are on the gear side of the machine, indicated by similar but primed reference numerals. The rock shaft 102 has an operating arm 109 fixed thereto, with which a link 110 is connected by an articulation 111. (See Figs. ,1, 2, 3, 4 and 7.)

A rock shaft isjournaled in a bearing 116 in the side frame, and has an arm 117 fixed there to. A link 118 has articulations with thearm 117 and an arm 119 on the eccentric shaft'54. Similar parts, indicated by similar but primed reference nu merals are at the gear side of the machine.-

An operating arm 121 is fixed to the rock shaft 115. A link 122 is articulated at 123 with said arm.

Operating bars 125, 126, have endwise reciprocation imparted thereto, and have articulations 127, 128, respectively with the links 110, 122. The bars are exemplified as slidable longitudinally respectively in bearings' 129, 130 and 131, 132, and on guideways 133, 134.

The bar is provided with shoulders 135, 136, shown at the respective ends of arccess 137 in the bar. The bar 126 is provided with shoulders .138, 139, shown at the respective ends of a recess 140 in said bar. Arms 141, 142 are pivoted on pivot shafts 143, 144, respectively mounted in bearings 145, 146, of a housing 147. (See Figs. 5, 6, 8, 9 and 13.)

oppositely extending pawls 151, 152, are pivoted to the arm 141, as on a pivot pin 153. These pawls are arranged to coact with the respective shoulders 135, 136, which shoulders are on hardened blocks 154, 155, let into recesses in the bar 125.

oppositely extending pawls 161, 162, are pivoted to the arm 142, as on a pivot pin 163. These pawls coact with the respective shoulders 138, 139, which are on hardened blocks 164, 165, fixed in recesses in the bar 126. The arm 142 is provided with a lateral extension 166.

A cam assembly 171 comprises cam plates 172 and 173, secured to the respective sides of a fly-wheel 174, as by bolts 175, 176. The cam plate 172 is provided with a cam groove slot- 177, and the cam plate 173 is provided with a cam groove 178. A roller 179 on a stud .180 on the arm 141 coacts with the walls of the slot 177. roller 181 on a stud 182 in the extension 166 of the arm 142, coacts with the walls of the cam slot 178.

The cam slot 177 has a low or dwelling portion 185, an ascending portion 186 and a descending portion 187. This cam is arranged to move the arm 141 for effecting movement of the lower impression cylinder -22 and'the feed cylinder 29 in manner to be presently described. (See 'Figs. 5 and 6.)

The .cam slot 178 is provided with a low or i dwelling portion 188, an ascending portion s1on relation.

' These movements are in synchronism with the rotations of said cylmders, so as to time the movements of the bars and consequent tripping of the cylinders in predetermined an ular relations to the rotations of the cylin ers for the purposes herein described.

a The means for rotating the'cam assembly 171 are shown as a gear 193 meshing witi the gear 87, by means of which the gear train for the cylinders is controlled, the gear 193 being fixed to a shaft 194 journaled in bearings 195, 196, in the bearing stand 86 and in the side frame respectively. The

' shaft 194'has a bevel gear 197 fixed thereto,

thereto.

which meshes with a bevel gear 198, fixed to a shaft 199 in bearings 200, 201, of gear boxes 202, 203, fixed to the frame. A bevel gear 204, fixed to the shaft 199, meshes with bevel gear 205 fixed to a shaft 206 journaled in a bearing 207 in the gear box 203 and in a bearing 208 in the housing 147. The shaft 206 has a pinion 209 fixed thereto, which meshes with a gear 210 on a fly wheel 211 fixed to a shaft 212, which also has the cam assembly 171 fixed thereto. The shaft 212 is journaled in bearings 213, 214. (See Figs.'2, 5 and 7.)

The manual control means for the tripping mechanism include treadle levers 221, 222, respectively carrying treadles 223, 224, the treadle levers being fixed to a rock shaft 225 in a bearing 226 in the frame of the machine. The rock shaft has an arm 227 fixed (See Figs. 1. 2 and 7.)

A rock shaft 228 is journaled in a bearing .229, in the base-of the machine, and in a bearing 230, in the housing 147. An arm 231 is fixed to this rock shaft. A link'232 is articulated with this arm and with the arm 227.

The. treadles and attendant parts'just de scribed are at the feed side of the machine. Similar parts indicated by similar but primed reference numerals are at the gear side of the machine.

- An arm 235 is fixed to the rock shaft 228.

and with an arm237 fixed to a rock shaft 238, which has arms 239, 240, fixed thereto A link 23s is articulated withithe. arm 235 permitting .the pawls'to coact respectively with the shoulders 135, 136.. 3, 6, 7, 8, 9,.13-and 14.)

The pawls151, 1.52, are normally urged toward coactive relation with the shoulders 135, 136, by plungers 245, 246, in sockets 247, 248, in the operating arm 141, the plungers be ng spring-pressed by springs249, 250, in SEl-ld. sockets toward said pawls. (See Figs. 13 and 14.)

(See Figs. 1,-

The contact parts for the pawls, namely,

the rollers 241, 242, are respectively normally held in actuated relation by being provided with notches 251, 252, into which a plunger 253 is arranged to be 'pressedby a spring 254 in a socket 255 of a locating plunger 256, reciprocating. in a socket 257 in a socket-piece 258, bracketed from the side wall of the housing 147.. A removable plate 259 is secured to thebottom of said socket-piece by screws 260. Asprin 261 between the top of a socket 262 in the p unger 256 and said plate 259, urges the locating plunger into engagement with the bar 125.

The contact parts for the pawls are arranged to be in contactingpositions at the limits of reciprocatingmovements ofthe operating arm to which they are pivoted, which correspond substantially to the cor responding respective limits of reciprocating movements of the operating bar coacting therewith. The locating plunger 256 is provided with'a locating cam 265, which is arranged to be received in notches 266,267, in the lower face of the reciprocating bar 125 at the limits of reciprocating movements of said bar, the lower face of said bar riding on the apex of said cam' during times when the reciprocatin bar is moving.

The coactingf said notches taper toward the middle of the cam, and they have sloping walls, so that the forceful endwise movement of the reciprocating bar 125 will not be interfered with, but that, upon such endwise movement aces between said cam andv of the bar, the cam will be caused to recede, l

understood that the operatingv arms 141, 142, reciprocate continuously durmg the operation of the printing press. When now, said arm 141 is moved to the right, its right hand pawl will remain out of contact w1th the right hand shoulder 135, leaving the bar 125 unactuated, for maintaining the cyllnders 1n on-impression relation.

. Vhen the contact part 242 1s placed in raised relation, the contact part 241 1s lowered, and the locating cam 265, belng received in the notch 266, the pawl 151 1s permitted to drop into contact relation with the shoulder 135, for moving the operatlng bar 125 to the right. The locating plunger 256 is lowered by such movement of the operating bar for placing said contact parts 241, 242, out of action between the limits of movements of the operating bar, the locating cam 265 moving into the notch 267 when the operatingarm 141 has completed its movement to the right, so as to move the contact part 242 into obstructing relation with the pawl 152, so that, upon the next return movemcnt of said operating arm to the left, the pawl 152 will be out of range with the shoulder 136. If, however, the contact parts 241, 242, have been rocked in the meantime, or thereafter, for again lowering the contact part 242 and raising the contact part 241, the pawl 152 will, on said next return reclprocation of the operating arm, toward the left, engage the shoulder 136, for movlng the operating bar 125 toward the left. There 1s a space 263 between said pawls and shoulders to readily permit such movement.

The parts just described are for controlling the pawls 151, 152, pivoted on the operating arm 141, and are instanced as located on the feed side of the housing 147, and as con-.

trolling the positions of the first or lower impression cylinder 22 and the feed cylinder 29.

-The pawls 161, 162; pivoted on the operating arm 142, for moving the second or upper. impression cylinder 24, are pressed toward the operating bar 126, by plungers and springs similar to the plungers 245, 246, and springs 249, 250.

The off-impression movement and on-impression movement respectively of the sec- 0nd or upper impression cylinder is timed, in the present exemplification, so as to be three-fourths of a revolution of the cam assembly, or of said impression cylinders, later than the similar movements of the first imtween the first impression cylinder and its form cylinders.

The control for the second impression cylinder is automatically transferred from the control means for the first impression c linder. This is instanced as accomplished y the following means:

272 fixed thereto. A link 273 is articulated with the arm 272 and with an arm 274 fi'xed to a rock shaft 27 5, which has arms 276, 277, rlgrd therewith, these arms carryingcontact parts 278, 279, shown as rollers, coacting with shelves, (similar to the shelves 243, 244), on the pawls 161, 162, pivoted to the operating arm 142, for controlling the direction of movement of the operating bar 126. (See Figs. 6, 8 and 9.) r

The rock shaft 271 is operated by the operating bar 125, which coacts with plungers 281, 282, reciprocating. in sockets 283, 284,

in a housing 285, rigid with the bearing 129.

plungers are reciprocated in opposite directions by the operating bar 125, which is shown accomplished by providing the o ratmg bar with an operating lug 291, w ich -is arranged to contact cam faces 292, 293,

on the respective rack plungers 281, 282, the lug having its contact parts with said cams shaped for coaction with said cams, as by providing the samewith coacting cam faces 294, 295. When the rack-plunger 282, is

raised, it is received in a recess 296 in the operating bar 125. (See Fig. 12.)

The on-impression movement and the offimpression movement of the first or lower impression cylinder take place during the travel of the grippers thereon between the.

point or moment of. paper taking by said grippers from the feed cylinder, which paper taking point or moment is in the radial line 301. (Fig. 16), which intersects, the 'axis of rotation of the lower im ression'cylinder and the axis of rotation of the feed cylinder, and the point or moment of initiation of printing impression upon the sheet between the lower impression cylinder and the first form cylinder 25, which rinting point or moment is in the radial line 302 which intersectsthe axis of rotation of the impression cylinder and the axis of rotation of the first form cylinder.

The on-impression movement of the lower impression c linder takes place during the coaction of t e ascending portion 186 of the cam 177 with theroller 17 9 on the arm 141, which takes place in the angle 303 between the radial lines 304, 305, imposed on said cam, which angle corres onds'with the angle 306 between the radia lines 307, 308, im-

posed on the lower impression cylinder, as exemplified in Fig. 16. The lower cylinder 2 grippers pression movement of the lower 5. impression cylinder takes place during succeeding angles of movements in said cam and impression cylinder respectively. The ottimpression movement of the .lower lmpression cylinder takes place during the coactlon of the descending portion 187 of said cam 177 with the roller 179,- which takes place in the angle 311 between the rad1al lines 305 and 312, imposed on said cam, which angle corresponds with the angle 313 between the 1 radial lines 308 and 314, imposed on the lower impression cylinder,

The on-im-pression movement and the olfim 'ression movement of the second or upper 1 cylinder take place during the travel of the thereon in advance of the point or moment of initiation of printing ampression upon the sheetbetween the upper i mpression cylinder and the tllll'd form cylinder 27 coacting therewith, which printing point or moment is in the radial line 317 -'which intersects the axis of rotation of the impression cylinder and the axis of rotation of said third form cylinder.

The on-impression movement of the up- 30 per impression cylinder takes placeduring the coaction of the ascending portion 189' of thecam groove '178 with the roller 181 on the extension166 of the arm 142, which takes place in the angle 318 between the radial 5 lines 319, 320, imposed on said cam, whichangle corresponds with the an 1e 321 between the radial lines 322, 323, lmposed on the Iiripper impression cylinder. as exemplified 1n 1 the ugper impresslon cylinder move during the on-im 'ression movement of said cylinder.

The 0 -impression movement of the upper impression cylinder takes place during succeeding angles of'movement in said cam and impression cylinder respectively. The ofl-impression movement of the upper 1mpression cylinder takes place during the coaction of the descending portion 190 of said cam 178 with theroller 181, which takes lace in the angle 325 between the radial ines 320, 326-, imposed onsaid cam, which angle corresponds with the angle 327 between the radial lines 323 and 328, imposed on the upper impression cylinder, through which the grippers of the upper impression cylinder move during the off-impression movement of said cylinder.

The respective movements of the upper impression cylinder are three-fourths of a revolution of said cylinder andof the cam portions therefor subsequent to the corresponding movements of the lower impression cylinder and the cam portions therefor, dueto the angle of separation between the rollers 179 and 181, the angleof separation 15, through which the grippers of and the relations'of the latter to each other,

as more fully illustrated in Figs. 6, 15 and 16. This belated movement of the second or upper cylinder with relation to the first or lower cylinder is as heretofore explained,

to permit a sheet being fed through the printing press to be fully rinted by both said impression cylinders, ii the impression cylinders have been setfor on-impression relation, and to be wholly unprinted if the impression cylinders have been previously set for off-impression relation. I

In explaining the operation, it will be assumed that the impression cylinders are in on-impression relation, as exemplified in Figs. 1 and 2, that the operating parts for the first or lower impression cylinder are at their limits of on-impression movements, as exemplified in Figs. 5, 6, 12, 14, 15, and 16'; that the printing operations are taking place on successive sheets fed from the feed board that the cam assembly 171 is rotating,

there being a rotation of the cam assembly for each rotation of the impression cylinders; that the operating arms 141, 142, are swinging, with the operating bar 125 for the lower or, first impression cylinder moved to its rear limit of movement, namely to the left, and the operating bar 126 for the second or upper impression cylinder moved to its forward limit of-movement, namely; to the right; and that the pawls are movin idly, due to the pawl 151 bein held in raise relation in adjacency to its s oulder b the contact part 241, and'the pawl 162 eing held in raised relation in adjacency to its shoulder by the contact part 279.

Assuming further that a sheet is improperly ripped by the grippers on the feed cylinder 29, and that the operatondesires t at that sheet shall not be printed, the operator presses upon the treadle 224 at the feed side or upon the treadle 224' at the gear side of the press, for placing the control parts in relation for tripping the cylinders into oil-impression relation. The actual trippin of the cylinders is, however, not initiated by the operating means until the grippers on the lower impression cylinder gripping the infeeding edge of the sheet arrive approximatel at their lowermost position in their circ e of movement, instanced as at the radial line 308. This moment is determined by the moment of arrival of the beginning of the descending portion 187 of the cam 177, exemplified by the radial line 305, at the position of the roller 179 on the arm 141. (See Fig. 6.)

The movement of the lower impression cylinder into ofi'-impression relation takes place during the movement of the grippers in the angle 313 in advance of the normal printing contact position between said impression cylinder and the printing surface on the first form cylinder, which corresponds in position with the angle'311 of the cam assembly.

Such off-impression movement of the lower impression cylinder also causes similarmovement of the feed cylinder and places said cylinders in the relation to the form cylinders 25, 26, exemplified in Fig. 3.

The movement of these cylinders into ofi" impression relation is caused by the lowering of the contact part-241, \\'lll(l1 permits the pawl 15] to drop intorugagement with the shoulder 135 on the operating bar 125,.

moving this opelating bar forwardly during the forward swinging ot' the operating arm 141 just initiated (see Fig. 13).

Such i'orward movement of the operating bar 125 causes contact by the cam face 294 (see Fig. 12) with the cam 292 on the rack plunger 281, for pushing said rack plunger downwardly, thereby rocking the shaft 271 and lowering the contact part 279 (see Figs. 8 and 9). This permits the pawl 162 to drop for engaging the shoulder 139 at the next rearward movement of the operating arm 142, (see Fig. 4), for moving the operating bar 126 rearwardly, and thereby rocking the rocky shaft 115 for moving the second or upper impression. cylinder into off-impression relation, as exemplified in Fig. 4.

Such tripping is, however, timed so as to delay the initiation of the tripping of the upper impression cylinder an interim, ex-

emplified as three-fourths of a revolution of the impression cylinders and of the cam assembly, after the initiation of tripping of the lower impression c linder, so as to permit a preceding sheet eing printed to pass between the upper impression cylinder and its plate cylinders while the former is still in on-impression relation, so as to completely print said preceding sheet previously printed by the lower impression cylinder and its coacting form cylinders.

The tripping of the lower impression cylinder takes place after the preceding sheet has been printed thereby, as exemplified in Fig. 3, and the tripping ot' the upper impression cylinder takes place only after said sheet is past printing position between the upper impression cylinder and its coacting p ate cylinders.

Upon initiation of movement of the operatlng bar 125 forwardly, the locating cam 265 is pushed downwardly by the wall of the cam notch 266, for pushing the locating plunger 256 downwardly and placing the contact parts 241, 242, out of range of the pawls 151, 152, so as to permit any desired control movement of said contact arts by the trcadles, and to insure the comp etion of an initiated movement of the cylinders into on-impression position'or off-impression position. In other words, the movements of said cylinders for on-impression position or tact parts 241, 242, are returned to normal positions upon completion of the forward movement of the operating bar 125, by the reception of the cam 265 in the recess 267 in said bar. The reverse movement of the bar causes corresponding movements of the 10- eating plunger. and its contact parts. a If nowit is desired to again place the impression cylinders into, on-impressio'n rela-' tion, the treadle 223 at the feed side or the treadle 223' at the gear side is depressedv for placing the control means of the tripping mechanism into trip inducing positions. The depression of these treadles causes the'contact part 242 to be lowered and the contact part 241 to. be raised for causing engagement of the pawl 152 with the shoulder 136 (see Figs. 6 and 13). The operating bar 125, being now at the forward limit of its movement, will at the next-rearward movement of the operating arm 141 to the left, be moved into the positions shown in Figs. 1 and 13. This movement of the operating bar causes rocking of the rock shaft 102 for moving the-lower impression cylinder and the vlower feed cylinder into on-impression relation, which movement takes place during movement of the grippers on the lower impression cylinder in the angle 306, and the -coaction between the ascending portion 186 of the cam 177 withthe roller 179 on the operating arm 141 in the angle 303 imposed on the cam 177.

The operating arms 141, 142, move in opposite directions with relation to each other for on-impression movement of the impression cylinders, and for oif-impression movement of said cylinders.-

The rearward movement of the operating bar 125 causes coaction between the cam face 295 thereon and the cam 293 on the rackplunger 282 for rocking the rock shaft 271 in reverse direction, and again lowering the contact part 278 and raising the contact part 279, for causing contacting between the pawl 161 and the shoulder 138 for moving the operating bar 126 forwardly and tripping the upper impression .cylmder into on-impression relation, as shown in Figs. 1 and 2, which tripping occurs three-fourths revolution of said cylinders and said cam assembly after the tripping of the lower impression cylinder.

sis

' press,

The tripping of the upper impression cylinder takes place during correspondlng an.- gles of rotation thereof and of the cam assembly as exemplified for instance in Fig. 15.

Having thus'fully described my invention, what I claim' as new, and desire to secure by Letters Patent, is: v

1. In tripping mechanism for a printing press, the combination with a cylinder formin a member of a printing couple, of operating 'means for moving said cylinder for distance relation with another member of said printing couple and operable throughout a short angle of movement of said cylinder, said operatin means constructed for placing said'cylin er out or control of the operator for the major portlon of the circle of movement of said cylinder, control means for said operating means,-and means distancing said control means from said operating means during shifting movements of said cylinder.

3. In tripping mechanism for a printing press, the combination with a cylinder forming a member of a printing couple, of operating means constructed for causing ap proach and recession movements respective- .ly of said cylinder for distance relation with another member of said printing couple and operable throughout closely related short angles of movements of said cylinder, control means for said operating means for con trolling said respective movements, and means distancing said control means from said operating means during shifting movements of said cylinder.

4. In tripping mechanism for a printing press, the combination with a cylinder forming a member of a printing couple, of operating means for trip ing said cylinder for distance relation wit another member of saidprinting couple and operable throughout short angles of movements of said cylinder, control means for said operating means operable throughout substantially the whole of the circle of movement of said cylinder,

and means distancing said control means from said operating means during shifting movements of said cylinder.

5. In tripping mechanism for a printing press, the combination with a cylinder formmg a member of a printing couple, of oper- .atmgmeans compr sing movable actuating parts constructed for causing on-tripping movement of said cylinder and off-tripping movementof said cylinder in sequence, control meansfor said operating means comprising movable control parts coacting with said movable actuating parts, and means placing said control parts in inactive relation during'on-tripping movement of said cylinder and into active relation at substantially the completion of said on-tripping movement, for initiation of off-tripping movement at the next sequential oif-tripping movement of said operatlng means.

6. In tripping mechanism for a printing press, the combination with a cylinder forming a member of a printing couple, of operating means comprising intermittently, operating parts causing on-tripping movement and ofl-tripping movement of said cylinder and operable throughout proximate short angles of rotations of said cylinder for said respective movements of said cylinder, control means comprising parts coacting with.

said operating means respectively for said on-trippmg movement and .for said oil-triplast-named parts are operable during one of said movements for control relation for the other of said movements of said cylinder.

7. In tripping mechanism for a printing short angles of rotations being closely related in time, control means comprising ping movement, and means whereby said parts respectively coacting with said intermittently operating parts respectively for said on-tripping movement and said ofl-tripping movement, and means for shifting said last-named parts durin one of said movements for control relation for the other of said movements of said cylinder.

8. In tripping mechanism for a printing press, the combination with an impression cylinder, grippers thereon, a form cylinder and a sheet positioning means, of operating means for moving one of said cylinders into on-impression relation and into ofl-impression relation sequentially in the order named in the angle of movement of said grippers between said sheet positioning means and said form cylinder in a single movement of said grippers in said angle, whereby to prevent printing by said cylinder after said cylinder has been moved into printing rela tion in said single angle of movement of said cylinder, grippers thereon, a form cylinder and a sheet positioning means, of operating means for moving said impression cylinder into on-im ression relation and into off-impression re ation in the angle of movement of said grippers between said sheet positioning means and said form cylinder, control means for said operating means, and actuatin means for said control means operable substantially throughout the balance of the circle of movement of said impression cylinder, and constructed and arranged for placing said control means into positions for coaction with said 0 rating means in the angle of movement 0 said grippers for onimpression. relation, whereby said operating means move said impression cylinder into oil-impression relation in the angle of the movement of said grippers between said onimpression angle and said form cylinder.

' 10. In'tripping mechanism for a inting press, the combination with an impression cylinder, grippers thereon, a form cylinder and sheet positioning. means, of operating means for moving said impression cylinder into on-iinpression relation and into off-impression relation throughout successive angles of movement in a single movement of said grippers between said sheet positioning means and the point of printing initiation between said cylinders, the sum of which angles is substantially less than one-half the complete circle of movement of said grippers, control means -for said operating means, and means for, movin said control.

means operable throughout su antially' the whole of the circle of movement of said grippers.

11. In tripping mechanism for a printing press, the combination with an impression cylinder, grippers thereon, .a form cylinder and sheetpositioning means, of operating means for moving said impression cylinder into on-impression relation and into off-impression relation throughout. successive angles of movement of said grippers between said sheet positioning means and said form cylinder, control means for said operating means, means for moving said control means operable throu hout substantiall the whole of the circle 0 movement of said grippers, and means automatically placing said control means'in inactive relation during said movements of said impression cylinder.

12. In trippin mechanism for a printing press, the combination with an impression cylinder, grippers thereon, a form cylinder and sheet positioning means, of reciprocating operating means moving in opposite directions throughout successive angles of movement of said grippers between said 'sheet positioning means and said form cylinder for moving said impression cylinder respectively into QII-IIIIPI'GSS 10D relation and into off-impression relation, control ating means controlled by means for said operating means and means for rende ring said control means inactive durin said movements of saidimpression cylin er.

.in means, manual setting means for one of said control means, means between the opersaid one of said control means and the ot er of said control means for automatically setting said other of said'control means according to the setting of said manually set control means, said operating meanseomprising means for tripping said 0 hnders in sequence, and means automatical y renderin the control means set by said manual setting means inactive.

14. In tripping mechanism for a printing press, the combination with a plurality of prmtmg couples each comprising a cylinder arranged'to be tripped, of means whereby said prmtmg couples are caused to print in nence, operating means for each of said cy inders for tripping the same in the sequence .of their rinting relations, control means for each 0 said operating means, setting means for each of said control means, manual mechanism connecting with one of said setting means,-and means rendering the control means arranged to be set by said.

one of said setting means inactive during ti'i ping movement of the cylinder contro ed thereby.

15. In tripping mechanism for a rinting press, the combination with a cylin er to be tripped, of shifting means for said cylinder, a rotary cam, means for rotating said cylinder and said cam in synchronism, a pivoted arm 'havingoperative connection with said cam for being operated by said cam, a reciprocatingbar having operative connection with said shifting means, movable connectlug means between said arm and said bar, control means controlling the positions of said connecting means, and means for causing inactive relation of said control means.

16. In tripping mechanism for a printing press, the combination with a cylinder to be tripped and shifting means for said cylinder, of a rotary cam, a pivoted arm having operative connection with said cam for being operated by said cam, a reciprocating bar having operative connection with said shifting means, oppositel extending pawls between said arm and sai bar for transmitting the movements in opposite directions of said arm to said bar, means for holding said respective pawls in inactive relations, actuating means for the latter, and means for causing inactive relation of said holding means. 4

17. In tripping mechanism for a printing press, the combination with a cylinder to be tripped and shifting means for said cylinder, of a rotary earn, a pivoted arm having operative connection with said cam for being operated by said cam, a reciprocating bar having operative connection with said shiftingmeans, a pair of oppositely extending pawls pivoted to said arm, said bar provided with shoulders respectively coacting with said pawls for transferr ng movements in opposite directions of said arm to said bar, contact parts for said respective pawls, means moving said contact parts into coactive relations with said respective pawls for moving said respective pawls into inactive relations with said shoulders, and means automatically moving said contact parts out of coactive relations with said pawls.

18. In tripping mechanism for a printing press, the combination with a cylinder to be tripped and shifting means for said cylinder, .of a reciprocating operating member, a reciprocating. bar having con-nection -w1 th said shifting'means and movable 1n opposite directions respectively for on-tripping movement and for ofi-tripping movement of said cylinder, oppositely extending pawls and coacting parts therefor operative between sa d reciprocating operating member and said bar, there being an idle operating space between said pawls and said coacting parts, control parts for said respective pawls constructed for operating to permit movement of said respective pawls into active relation or inactive relation with said eoacting parts,

and means placing said control parts in m- 1 active relation during reciprocating movement of said bar.

19. In tripping mechanism fora rinting press, the combination with a cylm er to be tripped and shifting means for said cylinder, of a reciprocating bar having operatlve connection with said shifting means, a reciprocating opera-ting member, oppositely extending pawls and shoulders therefor op eratively located between said operatlng member and said bar, a rocker part, contact parts thereon for said respective pawls for controlling the positions of said pawls With relation to said shoulders, means for actuating said rocker part, and means for moving said rocker part into inactive relation with said pawls.

20.- In tripping mechanism for a printing press, thejcombination with a cylinder to be tripped and shifting means for said cylinder, of a reciprocating-bar having operative connection with said shifting means, a reciprocating operating member, oppositely extending pawls and shoulders therefor operatively located between said operating membcr and said bar, a rocker part, contact parts thereon for said respective pawls for controlling the positions of said pawls with re lation to said shoulders, means for actuating said rocker part, a mounting for said rocker part,- and cam means between said mounting and said-bar automatically mov ing said contact parts into idle relation with said pawls during reciprocations of said bar.

21. In tripp ng mechanism for a printing press, the combination with a cylinder to be tripped and shifting means for said cylinder, of a reciprocating operating member, a reciprocating. bar, operating means between said operating member and said bar for causing reciprocations in similar directions between the same, control means for the latter, and a mounting for said control means, and said bar and said mounting provided wifh cam means whereby to retract said control means between the limits of reciprocating movements of said bar.

22. In tripping mechanism for a rinting press, the combination with a cyliml tripped and shifting means for said cylinder, of a reciprocating operating-member, a reciprocating bar having operative connection-with said shifting means, opposite-' ly extending spring pressed awls and shoulders therefor op'eratively ocated between said operating member and said bar, control parts for said respective pawls, a

spring-pressed mounting normally movin said control parts toward said pawls, an means for actuating said control parts, and

said bar and said mounting provided with.

cam means whereby to resiliently moveisaid mounting away from said bar for-placing said control arts into inactive relations with said paw s. i v

23. In tripping mechanism for a printing press, the combination with a plurality of printing couples each comprising. a cylinder ertobeto be tripped, of shifting means for said re spective cylinders for tripping the same, similar rotary cams havmg colncident axes arranged in dill' erent angular relations,.a

'said connecting means including one of said reciprocating elements.

24. In tripping mechanism for a printing press, the combination with a plurality of printing couples each comprising a cylinder to be tripped, of shifting means for said respective cylinders for tripping the same, similar rotary cams having coincident axes arranged in different angular relations, a

pivoted arm for each of said cams, a reciprocatingbar for each of said shifting means, 

